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pm_rps: Add read back checking on sysfs writes

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Signed-off-by: Jeff McGee <jeff.mcgee@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jeff McGee 2014-01-17 16:56:04 -06:00 committed by Daniel Vetter
parent e07e758004
commit 0102b6bde6
1 changed files with 6 additions and 1 deletions
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7
tests/pm_rps.c
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@ -68,15 +68,20 @@ static int readval(FILE *filp)
static int do_writeval(FILE *filp, int val, int lerrno) static int do_writeval(FILE *filp, int val, int lerrno)
{ {
int ret; int ret, orig;
orig = readval(filp);
rewind(filp); rewind(filp);
ret = fprintf(filp, "%d", val); ret = fprintf(filp, "%d", val);
if (lerrno) { if (lerrno) {
/* Expecting specific error */ /* Expecting specific error */
igt_assert(ret == EOF && errno == lerrno); igt_assert(ret == EOF && errno == lerrno);
igt_assert(readval(filp) == orig);
} else { } else {
/* Expecting no error */ /* Expecting no error */
igt_assert(ret != EOF); igt_assert(ret != EOF);
igt_assert(readval(filp) == val);
} }
return ret; return ret;